JP2009279802A - Clip fitting structure of writing utensil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clip fitting structure which is not susceptible to intricate scuff marks in the outer surface of a fitting wall and the inner surface of a folded piece of a clip even when used for a long time, and have a presentable appearance even in case the clip is formed of a transparent synthetic resin. <P>SOLUTION: In this clip fitting structure of a writing utensil, outwardly facing rotating support shafts are installed protruding in the outer surfaces of a pair of fitting walls disposed upright in the axial direction respectively, on the tail end side of a barrel. Further, fitting holes are each formed on the tail end sides of a pair of folded pieces obtained by folding inwardly both side edges, in the axial direction, of the clip, and the rotating support shafts are rotatably fitted into the fitting holes respectively and the ball part of a clip apex part is pressed in contact with the surface of the barrel by the resilient force of a spring interposed between the clip and the surface of the barrel. The clip is molded of a transparent synthetic resin and has a globular micro protuberance formed at the apex of the clip on the outer surface of the fitting wall of the barrel. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a clip mounting structure, and further relates to a clip mounting structure in which a clip is formed of a transparent synthetic resin.

Conventionally, when the tail end of a clip is pressed, the ball at the tip of the clip is greatly separated from the surface of the shaft cylinder or cap, and it is known that a writing instrument can be sandwiched between thick binders. The mounting structure of, for example, is configured by projecting an outward rotation support shaft on the outer surface of a pair of mounting walls that are erected in the axial direction on the tail end side of the shaft cylinder or cap, respectively, and both side edges in the axial direction of the clip A locking hole is formed on the tail end side of each of the pair of bent pieces that are bent inwardly, and the pivot shaft is rotatably engaged with the locking hole. The ball portion at the tip of the clip is pressed against the shaft tube or the cap surface by the elastic force of the spring interposed between the clip and the shaft tube or the cap surface. When the clip is pushed, the ball at the tip of the clip is greatly separated from the shaft tube or the cap surface against the spring force of the spring.
JP 2007-210215 A

  In the above clip mounting structure, if the clearance between the outer surface of the mounting wall formed on the surface of the shaft cylinder or the cap and the inner surface of the bent piece of the clip is large, the clip rattles in the direction perpendicular to the axis, The dimension between the inner surfaces of the pair of bent pieces in the natural state is slightly smaller than the dimension between the outer surfaces of the mounting wall, and the pair of bent pieces expands slightly during assembly so that the outer surface of the mounting wall and the clip The inner surface of the bent piece is in contact. By the way, the parts of the writing instrument are often molded from a transparent synthetic resin mainly from the viewpoint of design, but the clip may also be molded from a transparent resin.

  Therefore, when the clip is rotated by pushing the tail end side of the clip, the outer surface of the mounting wall and the inner surface of the clip's bent piece are relatively in sliding contact with each other, but the rotation operation is repeated for a long time. In this case, complicated scratches can be formed on the outer surface of the mounting wall and the inner surface of the bent piece of the clip. However, when the clip is formed of a transparent synthetic resin, there is a problem that the complicated scratches are visible and the appearance is unsightly.

  Therefore, the present invention does not cause complicated scratches on the outer surface of the mounting wall and the inner surface of the bent piece of the clip even if it is used for a long time, and even if the clip is molded with a transparent synthetic resin, the clip mounting is hardly unsightly in appearance. Provide structure.

  Accordingly, in the present invention, outward rotation support shafts project from the outer surfaces of a pair of mounting walls erected in the axial direction on the tail end side of the shaft cylinder or cap, and both side edges in the axial direction of the clip are inward. Each of the pair of bent pieces folded in the direction of the tail end side is formed with a locking hole, the rotating support shaft is rotatably engaged with the locking hole, and the clip and the shaft tube or the cap surface In the clip mounting structure in which the ball part at the tip of the clip is pressed against the shaft tube or the cap surface by the elastic force of the spring interposed between them, the clip is molded with a transparent synthetic resin, and the shaft tube or the cap A minute projection having a spherical tip is formed on the outer surface of the mounting wall or the inner surface of the bent piece of the clip.

  A spherical microprotrusion at the tip is formed on the outer surface of the mounting wall of the barrel or cap or the inner surface of the bent piece of the clip. Point contact. Therefore, even if the clip is rotated repeatedly, a complicated scuff does not occur and only a thin arc-shaped scratch can be made, and even if the clip is molded with a transparent synthetic resin, the clip mounting is not unsightly in appearance. It can be a structure.

  The best mode for carrying out the invention will be described below with reference to the drawings. In FIG. 1, a plurality of refills are accommodated in the shaft cylinder 2, and a presser 29 connected to the tail end of the refill projects from a window hole 28 formed in the peripheral surface on the tail end side of the shaft cylinder 2. Yes. Then, when the presser 29 is slid to the tip side with the fingertip, the refill pen body projects from the tip opening of the shaft tube and is a known multi-core writing instrument. As shown in FIG. 2 and FIG. 3, a pair of mounting walls 21, 21 are projected in the axial direction on the outer peripheral surface on the tail end side of the shaft tube 2, and the outer surface 21 a of the mounting wall 21 is respectively The rotation support shafts 22 and 22 are formed outward. In addition, it is not restricted to this multi-core writing instrument, The thing in which the attachment wall 21 is formed may be a cap of a writing instrument.

  The clip 1 is formed of a transparent synthetic resin, and both end portions in the axial direction of the clip 1 are bent inward to form a pair of bent pieces 11 and 11. The dimension between the inner surfaces 11 a and 11 a of the locking piece 11 is substantially equal to the dimension between the outer surfaces 12 a and 12 a of the mounting wall 12. And the locking holes 12 and 12 are formed in the tail end part of the bending piece 11, respectively. The inner diameter of the locking hole 12 corresponds to the outer diameter of the rotating support shaft 22, the bent pieces 11, 11 are fitted to the outside of the mounting walls 12, 12, and the rotating support shaft 22 is inserted into the locking hole 12. It is pivotally engaged.

  As shown in FIG. 4, a minute protrusion 23 having a spherical tip is formed on the outer surfaces 21 a and 21 a of the mounting walls 21 and 21. The height of the microprotrusion 23 is about 0.05 mm, for example, and its spherical tip is in light contact with the inner surface 11 a of the bent piece 11. For this reason, the clip 1 does not rattle in the direction perpendicular to the axis. Note that the minute protrusions 23 may be formed on the inner surface 11 a of the bent piece 11.

  An inward first wall 13, a second wall 14, and a steady-state projection 15 that are orthogonal to the bent piece 11 are formed at the tail end of the clip 1, and the bent pieces 11, 11, the first wall 13, A spring 3 that is a torsion coil spring is disposed in a space defined by the two walls 14 and the surface of the shaft cylinder 1. The tail end side of the clip 1 is pushed up by the elastic force of the spring 3, and the ball portion 16 at the tip of the clip 1 comes into pressure contact with the surface of the shaft tube 1. The spring 3 may be a coil spring or a U-shaped leaf spring.

  Thus, when the tail end side of the clip 1 is pressed from the rotation support shaft 22, the clip 1 is rotated around the rotation support shaft 22, and the ball portion 16 is greatly separated from the surface of the shaft tube 1. It is possible to hold the writing instrument even in the thickness of. When the clip 1 rotates about the rotation support shaft 22, the tip of the microprojection 23 that makes point contact with the inner surface 11 a of the bent piece 11 has a radius between the center of the rotation support shaft 22 and the microprojection 23. Slide in an arc shape. Therefore, when used for a long time, the inner surface 11a of the bent piece 11 can be scratched in an arc shape, but it is not a complicated scratch due to surface contact but is a regular thin arc-shaped scratch, so the clip 1 is made of synthetic resin. Despite molding, it feels almost unsightly.

It is a front view of this invention Example. It is sectional drawing of the principal part in the AA line of FIG. It is sectional drawing of the principal part in the BB line of FIG. It is an enlarged view of the C section of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Clip 11 Bending piece 11a Inner surface 12 Bending hole 13 1st wall 14 2nd wall 15 Stabilizing projection 16 Ball part 2 Shaft cylinder 21 Mounting wall 21a Outer surface of mounting wall 22 Rotating support shaft 23 Micro projection 28 Window hole 29 Presser 3 Spring

Claims (1)

A pair of folds, in which outward pivoting support shafts project from the outer surfaces of a pair of mounting walls standing in the axial direction on the tail end side of the shaft cylinder or cap, and both side edges in the axial direction of the clip are bent inward A locking hole is formed at each tail end side of the bent piece, and the rotation support shaft is rotatably engaged with the locking hole and is interposed between the clip and the shaft cylinder or the cap surface. In the clip mounting structure in which the ball part at the tip of the clip is pressed against the surface of the shaft cylinder or the cap surface by the elastic force of the spring.
A clip mounting structure, wherein the clip is formed of a transparent synthetic resin, and a microscopic projection having a spherical tip is formed on an outer surface of a mounting wall of a shaft cylinder or a cap or an inner surface of a bent piece of a clip.

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